Giải các phương trình: a) $\frac{8(x+22)}{45} - \frac{7x + 149 + \frac{6(x+12)}{5} }{9} = \frac{x+35 +\frac{2(x+50)}{9} }{5} $ b) $\frac{(x-3)^2}{6} - \frac{(x-6)^2}{15} = \frac{(x+9)^2}{10} - \frac{13x - 1}{3} $
c) $\frac{x+1}{65} + \frac{x+3}{63} = \frac{x+5}{61} + \frac{x+7}{59} $
d) $\frac{315 - x}{101} +\frac{313-x}{103}+ \frac{311-x}{105} + \frac{309 - x}{105} + 4 = 0 $ e) $\frac{x-29}{1970} +\frac{x-27}{1972}+ \frac{x-25}{1974}+ \frac{x-23}{1976}+ \frac{x-21}{1978} +\frac{x-19}{1980} = \frac{x-1970}{29} + \frac{x-1972}{27} + $ $\frac{x-1974}{25} + \frac{x-1976}{23} + \frac{x-1978}{21} + \frac{x-1980}{19} $
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